Part I

, ch. xxvi) received: "Christ is neither servant nor master of Himself. It is foolish, or rather impious, to think or say this." And Damascene says the same (De Fide Orth. iii, 21): "The one Being, Christ, cannot be the servant or master of Himself." Now Christ is said to be the servant of the Father inasmuch as He is subject to Him. Hence Christ is not subject to Himself.

Obj. 2: Further, servant has reference to master. Now nothing has a relation to itself, hence Hilary says (De Trin. vii) that nothing is like or equal to itself. Hence Christ cannot be said to be the servant of Himself, and consequently to be subject to Himself.

Obj. 3: Further, "as the rational soul and flesh are one man; so God and man are one Christ," as Athanasius says (Symb. Fid.). Now man is not said to be subject to himself or servant to himself or greater than himself because his body is subject to his soul. Therefore, Christ is not said to be subject to Himself because His Manhood is subject to His Godhead.

_On the contrary,_ Augustine says (De Trin. i, 7): "Truth shows in this way" (i.e. whereby the Father is greater than Christ in human nature) "that the Son is less than Himself."

Further, as he argues (De Trin. i, 7), the form of a servant was so taken by the Son of God that the form of God was not lost. But because of the form of God, which is common to the Father and the Son, the Father is greater than the Son in human nature. Therefore the Son is greater than Himself in human nature.

Further, Christ in His human nature is the servant of God the Father, according to John 20:17: "I ascend to My Father and to your Father to My God and your God." Now whoever is the servant of the Father is the servant of the Son; otherwise not everything that belongs to the Father would belong to the Son. Therefore Christ is His own servant and is subject to Himself.

_I answer that,_ As was said above (A. 1, ad 2), to be master or servant is attributed to a person or hypostasis according to a nature. Hence when it is said that Christ is the master or servant of Himself, or that the Word of God is the Master of the Man Christ, this may be understood in two ways. First, so that this is understood to be said by reason of another hypostasis or person, as if there was the person of the Word of God ruling and the person of the man serving; and this is the heresy of Nestorius. Hence in the condemnation of Nestorius it is said in the Council of Ephesus (